Bryan Cowden identified the letters on the non-numbered pages of the book were an anagram for “I AM LINK”
Chris Palmer identified in Level 1 Rad Racer & Paperboy, “I throw on my blue and red shades…” refers to being able to play Rad Racer in 3-D with 3-D goggles.
Jimmy Weneski identified in Level 2 Metal Gear, “I push forward ... to the left, not to the center, and not to the right,” refers to taking the left elevator of the three options after defeating Big Boss. Jennifer’s brother tells Solid Snake to take the left elevator when he escapes the complex.